Array rotate array

LC Rotated array

Ideas ： Move last element to first , Elements in other positions move back one bit , loop k Time

• Swift

    /*  example ： nums = [1,2,3], k = 4 [3,1,2] [2,3,1] [1,2,3] [3,1,2]  Each time the last element is moved to the first place , Other bit elements move backward one bit in turn ; Cyclic movement k Time  */
    
    func rotate(_ nums: inout [Int], _ k: Int) {
    
        
        var k: Int = k
        
        while k > 0 {
    
            
            let temp: Int = nums.last!
            
            var index = nums.count - 1
            while index > 0 {
    
                
                nums[index] = nums[index - 1]
                
                index -= 1
            }
            
            nums[0] = temp
            
            k -= 1
        }
    }